Rubber shoe.



110.798,76?. PATBNTBD SEPT. 5, 1905. 111110111111111.

RUBBER SHOE.

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UNITED STATES PATENT oEEToE.

HENRY J. DOUGHTY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO ATLANTICRUBBER SHOE COMPANY, OF TRENTON, NEW JERSEY, A

RUBBER SHOE.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application led November 4, 1901. Serial No. 81,010.

In n//l lolz/om, it may concern:

Re it known that I, HENRY J. DOUGHTY, a citizen of the United States,residing at Providence, in the county of Providence and State 5 of RhodeIsland, have invented a new and useful Improvement in Rubber Shoes, ofwhich the following is a specification.

Rubber shoes are usually designed Afor use as overshoes, worn over theshoe-clad foot.

l The margin of the shoe around the opening' of the rubber shoe intowhich the shoe-clad foot is inserted, called the mouth, is subjected togreater strain than other parts of the uppers of the shoe. The marginofthe mouth I must also h't tightly on the shoe-clad foot to prevent theadmission of water, snow, or slush. The sole of a rubber shoe issubjected to greater wear than the uppers, which serve to cover andprotect the uppers of the shoe-clad 2O foot against moisture. A durableand practically waterproof rubber shoe should have dense durable soles,waterproof flexible uppers, and a strong durable margin adjoining themouth of the shoe. Rubber shoes molded in heated dies have beensubjected to practically uniform pressure and were of uniform density.

The object of this invention is to proluce a molded rubber shoe in whichpart of the material is denser than the part forming the uppers of theshoe.

Figure I is a side View of my improved rubber shoe; and Fig'. 2 is atransverse sectional view of the same, taken on line X X of Fig. l.

Similar marks of reference indicate correspendingl partsv in bothfigures.

ln the drawings, c indicates the upper of the shoe; a, the margin of theupper inclosing' the mouth of the shoe; u2, the sole, and a. the heel ofthe shoe. 40

By practical tests I have ascertained that rubber compounds when moldedbetween two rigid surfaces while subjected to heat and pressure formwhen vulcanized a denser and stronger fabric than when the compound isnot subjected to pressure or to a yielding pressure. It appears that thefumes of the vulcanizing agent in the compound more intimately unitewith the particles of the compound when held between rigid surfaces. Incarrying out my invention I therefore employ certain molds and formswhereby the margin of the upper inelosing the mouth of the shoe and alsothe sole are vulcanized Linder pressure, as is fully illustrated anddescribed in 5.5 Letters Patent issued to me March I7, 1903, andnumbered 722,822.

Having thus described my invention, I claim as new and desire to secureby Letters Patent I. A molded rubber shoe having' the margin 60inclosing the mouth .of the shoe and the sole portion denser than theuppers, as described.

2. A homogeneous rubber shoe having ilexible uppers, the sole portionand the margin inclosing the mouth of the shoe being denser than theuppers, as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HENRY J. DOUCrl-ITY.

Witnesses:

ADA E. HAGERTY, Josurn A. MILLER, Jr.

